CTI SDK supporting JTAPI 1.3 with 4 MGCP endpoints. This SDK
supports calls in SIP between any two endpoints by dialing 9 followed by
another extension. The SDK is free of charge with an endpoint simulator.

An iPBX evaluation system that supports SIP for interfacing with a
SIP gateway (we also provide our own in this system usign NMS cards).
This system can be ordered directly from 8x8.

A service provider solution that has full SIP support. This is
exclusively for service providers willing to deploy our solution.